Update dependency peewee to ~3.19.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
peewee (changelog)	~3.18.0 → ~3.19.0

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Release Notes

coleifer/peewee (peewee)

v3.19.0

Compare Source

• Move to new build system using pyproject and github actions.
• No longer build and ship the Sqlite C extensions by default. Users who prefer
  to use those can install via the sdist pip install peewee --no-binary :all:.

Rationale about the Sqlite C extensions -- I've started shipping pysqlite3 as a
statically-linked, self-contained binary wheel. This means that when using
Peewee with the statically-linked pysqlite3, you can end up in a funny
situation where the peewee Sqlite extensions are linked against the system
libsqlite3, and the pysqlite driver has it's own Sqlite embedded, which does
not work.

If you are using the system/standard-lib sqlite3 module then the extension
works properly, because everything is talking to the same libsqlite3.

Similarly if you built pysqlite3 to link against the system libsqlite3
everything also works correctly, though this is not "wheel-friendly".

So in order to use the C extensions, you can install Peewee from the sdist and
do either of the following:

# Use system sqlite and standard-lib `sqlite3` module.
$ pip install peewee --no-binary :all:

# OR,

# Use pysqlite3 linked against the system sqlite.
$ pip install pysqlite3 peewee --no-binary :all:

I don't believe, besides myself, there were many people using these extensions
so hopefully this change is not disruptive! Please let me hear about it if I'm
mistaken.

Other small changes:

• When exporting / "freezing" binary data with the playhouse.dataset JSON
  serializer, encode binary data as base64.

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